From 7baebfeb6ae762db688ed0627be15ab4cb9ba1bc Mon Sep 17 00:00:00 2001
From: Maurice Parker <mo@vincode.io>
Date: Thu, 6 Aug 2020 17:05:53 -0500
Subject: [PATCH] Don't notify the delegate of a selected article change if
 they haven't actually changed

---
 Mac/MainWindow/Timeline/TimelineViewController.swift | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Mac/MainWindow/Timeline/TimelineViewController.swift b/Mac/MainWindow/Timeline/TimelineViewController.swift
index 089f4ead0..6c05d015c 100644
--- a/Mac/MainWindow/Timeline/TimelineViewController.swift
+++ b/Mac/MainWindow/Timeline/TimelineViewController.swift
@@ -164,6 +164,8 @@ final class TimelineViewController: NSViewController, UndoableCommandRunner, Unr
 		}
 	}
 
+	private var previouslySelectedArticles: ArticleArray?
+
 	private var oneSelectedArticle: Article? {
 		return selectedArticles.count == 1 ? selectedArticles.first : nil
 	}
@@ -816,6 +818,8 @@ extension TimelineViewController: NSTableViewDelegate {
 	}
 
 	private func selectionDidChange(_ selectedArticles: ArticleArray?) {
+		guard selectedArticles != previouslySelectedArticles else { return }
+		previouslySelectedArticles = selectedArticles
 		delegate?.timelineSelectionDidChange(self, selectedArticles: selectedArticles)
 		delegate?.timelineInvalidatedRestorationState(self)
 	}